Copper-carbon composite material and preparing method thereof

Abstract

The invention discloses a copper-carbon composite material and a preparing method thereof. Natural flake graphite, colloidal graphite, nano graphite, carbon fiber and the like can be selected as a carbon material in the copper-carbon composite material. The preparing method of the copper-carbon composite material includes the steps that firstly, a chemical nickel plating method is used for preparing a nickel plating carbon material; then a chemical copper plating method is used for plating copper on the nickel plating carbon material; and finally, vacuum semi-solid-state low-pressure sintering is conducted on the copper plating carbon material under the copper melting point temperature, and the copper-carbon composite material is prepared. The copper-carbon composite material and the preparing method thereof have the beneficial effects that a layer of even thin nickel plating layer is formed on the surface of carbon through the nickel plating method so as to reduce the wetting angle of the carbon material, the copper plating layer is formed on the surface of the nickel plating carbon material through the copper plating method so that a three-dimensional copper network can be formed by the material in the sintering process, and the bonding strength of a base body is improved through vacuum semi-solid-state low-pressure sintering. The two phases of the base body and the carbon of the copper-carbon composite material prepared through the method are distributed evenly and are well combined, and the good electricity and mechanical properties and the good frictional wear performance are achieved.

Description

Technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a copper-carbon composite material and a preparation method thereof. Background technique [0002] Copper-carbon composite material is a very promising metal matrix composite material. It not only has the good strength and hardness of copper, excellent electrical conductivity, thermal conductivity, and corrosion resistance, but also has good carbon self-lubricity, high melting point, Welding resistance and arc ablation resistance have been widely used in electrical contact materials, friction materials, oil-impregnated bearings, conductive materials and mechanical parts materials. With the rapid development of science and technology, on the one hand, the demand for copper-carbon composite materials has soared, and on the other hand, industrial upgrading puts forward higher requirements on the performance of copper-carbon composite materials. Therefore, domestic and foreign ...

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Problems solved by technology

Copper and carbon do not react even at high temperatures, and the wettability is extremely poor. The wetting angle reaches 140° at a high temperature of 1100°C. However, the existing copper / graphite materials cannot be prepared by copper / carbon Effective control of the interface continuity and interfacial bond strength seriously restricts the improvement of material strength and lubricating performance. When loaded, it often causes graphite particles to pull out, peel off and fall off.

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